linux-kernel - [PATCH v2 11/11] platform/x86:intel/pmc: Get LPM information for Lunar Lake

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240828222932.1279508-12-xi.pardee@linux.intel.com>
Date: Wed, 28 Aug 2024 15:29:26 -0700
From: Xi Pardee <xi.pardee@...ux.intel.com>
To: xi.pardee@...ux.intel.com,
	irenic.rajneesh@...il.com,
	david.e.box@...ux.intel.com,
	hdegoede@...hat.com,
	ilpo.jarvinen@...ux.intel.com,
	platform-driver-x86@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org
Subject: [PATCH v2 11/11] platform/x86:intel/pmc: Get LPM information for Lunar Lake

Add support to find and read the requirements from the telemetry
entries for Lunar Lake platforms.

Signed-off-by: Xi Pardee <xi.pardee@...ux.intel.com>
---
 drivers/platform/x86/intel/pmc/lnl.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/platform/x86/intel/pmc/lnl.c b/drivers/platform/x86/intel/pmc/lnl.c
index 109b08d43fc8..f5fee9e105e2 100644
--- a/drivers/platform/x86/intel/pmc/lnl.c
+++ b/drivers/platform/x86/intel/pmc/lnl.c
@@ -13,8 +13,13 @@
 
 #include "core.h"
 
+#define SOCM_LPM_REQ_GUID	0x15099748
+
+static const u8 LNL_LPM_REG_INDEX[] = {0, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15, 16, 20};
+
 static struct pmc_info lnl_pmc_info_list[] = {
 	{
+		.guid	= SOCM_LPM_REQ_GUID,
 		.devid	= PMC_DEVID_LNL_SOCM,
 		.map	= &lnl_socm_reg_map,
 	},
@@ -536,6 +541,7 @@ const struct pmc_reg_map lnl_socm_reg_map = {
 	.lpm_live_status_offset = MTL_LPM_LIVE_STATUS_OFFSET,
 	.s0ix_blocker_maps = lnl_blk_maps,
 	.s0ix_blocker_offset = LNL_S0IX_BLOCKER_OFFSET,
+	.lpm_reg_index = LNL_LPM_REG_INDEX,
 };
 
 #define LNL_NPU_PCI_DEV		0x643e
@@ -561,6 +567,8 @@ static int lnl_resume(struct pmc_dev *pmcdev)
 
 int lnl_core_init(struct pmc_dev *pmcdev)
 {
+	bool ssram_init = true;
+	int func = 2;
 	int ret;
 	struct pmc *pmc = pmcdev->pmcs[PMC_IDX_SOC];
 
@@ -578,6 +586,7 @@ int lnl_core_init(struct pmc_dev *pmcdev)
 
 	/* If regbase not assigned, set map and discover using legacy method */
 	if (ret) {
+		ssram_init = false;
 		pmc->map = &lnl_socm_reg_map;
 		ret = get_primary_reg_base(pmc);
 		if (ret)
@@ -586,5 +595,11 @@ int lnl_core_init(struct pmc_dev *pmcdev)
 
 	pmc_core_get_low_power_modes(pmcdev);
 
+	if (ssram_init)	{
+		ret = pmc_core_ssram_get_lpm_reqs(pmcdev, func);
+		if (ret)
+			return ret;
+	}
+
 	return 0;
 }
-- 
2.43.0